Monitor device



FIG. 1 is a front first perspective view of a monitor device showing my new design;

FIG. 2 is a front second perspective view of the monitor device showing my new design;

FIG. 3 is a front third perspective view of the monitor device showing my new design;

FIG. 4 is a front fourth perspective view of the monitor device showing my new design;

FIG. 5 is a front fifth perspective view of the monitor device showing my new design;

FIG. 6 is a front elevational view of FIG. 1;

FIG. 7 is a left side elevational view of FIG. 1, a right side view being a mirror image;

FIG. 8 is a bottom plan view of FIG. 1; and,

FIG. 9 is a rear perspective view of the monitor device.

The broken lines showing of environment in FIGS. 7, 8 and 9 are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a monitor device, as shown and described. 